Ettringite and Caledonite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Partially soluble in water
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.77
5.6-5.76
Fracture
Not Available
Uneven, UnevenAnthony et al, Handbook of mineralogy (2001)
Cleavage
Perfect on {10 1 0}
[001] perfect; [100] distinct
Mohs Hardness
2-2.5
2.5-3
Chemical Composition
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
Ettringite and Caledonite Chemical Formula
While comparing Ettringite and Caledonite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Ettringite and Caledonite chemical formula.
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Caledonite- Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
Ettringite and Caledonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Ettringite and Caledonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Caledonite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 5.6-5.76 whereas that of Caledonite is 5.6-5.76.